Riveria Ljos Alf, currently 24 years old and the vice captain of the Loki Familia. To outsiders she is seen as the mother of the familia. Many of the members were really interested in her love life, but what if she was already engaged in someone?
Flash Back/Dream
We can see Riveria as a kid playing outside. She was playing alone until she saw a boy playing with some wooden swords. She stood up and walked his way.
"Um hello" Riveria said, "my name is Riveria! What's yours?"
The boy was scared from the sudden appearance of the girl. He composed himself and looks at the girl, the most notable thing about her was her jade hair and eyes.
"H..Hello! I'm Bell!" The boy said with his cheeks having a heavy red color
Riveria laughed the boy's antics, she found him really cute.
Riveria POV
I woke up, and I saw it was just a dream of when I first met Bell. My father told me he had a mission for him, and that was 7 years ago, Bell's 19 birthday just passed. I haven't gotten any letters on how Bell is doing. What if Bell died!? No! Bell's strong enough to protect himself. But we're engaged so it's my duty to worry for him
"Miss Riveria!" A voice called out from behind her room door, "I'm ready for my morning training"
"Okay Lefiya!" Riveria said through the door, "meet me in the library, I'll get ready really quick"
Riveria changed into her mage robes, she grabbed her books that taught the basics of magic. It might have seemed useless but magic had a different effect for everyone. There were also different kinds of magic depending on how the user viewed it.
Bell POV
I woke up and went to the dungeon. Riveria doesn't know I'm here...I haven't seen her in 7 years. Over the past 7 years I've been going around cities, I got to Orario 2 years ago and I found out Riveria joined the Loki Familia. I hope she doesn't see me, she's definitely going to kill me when she finds out I've been in Orario for 2 years
"Ahhhh" a person yelled out from nearby. Bell heard this and went to rush in, only to find that the person had been killed by a Minotaur. Bell rushed in with his spear and instantly killed the Minotaur. He went up to the pile of blood and saw a pallum girl laying there.
"I..I was too late" Bell said in disappointment, "the only thing I can do now is report this to the guild"
Bell grabbed the body and wrapped it in some covers, he took the body back to the guild to inform Royman
"Mister Royman, someone had been killed by a Minotaur in floor 5" Bell said
"I'm sorry to hear that Bell, leave the body here and we shall send our condolences to their familia" Royman said, Bell was about to leave until Royman called him again
"Oh Bell! King Larfal had sent you a letter" Royman said while handing Bell a letter
"L..Larfal! R..Riveria's d..dad!" Bell yelled out mentally, Larfal is Rivera's dad, and Bell's soon to be Father in law.
"O..Okay t..thanks Royman" Bell said before walking out. Bell looked at the letter and saw a stamp that belongs to Alf's Royal Forest, the birth place of Riveria. Bell opened the letter and started to read its contents.
Dear Bell,
I would like to inform you that you would be taking a break, the information you have gathered regarding the dungeon had satisfied the council. I am proud to be calling you my son in law, you have done a lot to help the elven people despite how the others view humans.
P.S please take care of my daughter for me.
Sincerely, Larfal Ljos Alf
"W..Wait, I can finally see Riveria!? After 7 years!?" Bell thought while running to the twilight manor, "I must meet her immediately"
Riveria POV
I was training Lefiya, I had this weird feeling in me. It felt like Bell was with me which was weird seeing as how I haven't seen him since 7 years. We continued with training until Lefiya got tired, I told her to take a break while I walked outside for a bit. I was about to go back until I heard some yelling from the front gate. I checked it out and I saw a guard arguing with a person with white hair and red eyes, Bell! It's him! It's really him!
Riveria rushed at Bell tackling him to the floor with a hug. The guard saw this and decided to walk away, this was really awkward situation for him to be in.
"Bell! Is it really you?" Riveria asked, "this isn't a dream right?"
"N..No I think i..it's real" Bell said while blushing, "I t..think I k..know to s..see if we a..are d..dreaming or not"
Bell leaned in for a kiss shocking Riveria, the kiss continued for a good minute until Bell remembered they were outside and backed away fast. Thankfully there wasn't anyone else there(Bell you sly fox!)
"Oh? Bell are you perhaps to shy to kiss your fiancé in public" Riveria teased
"N..No! I..I'm j..just happy, I finally get to s..see you!" Bell said with steam practically coming out of his ears, then he fainted!
"Bell, wake up" Riveria said "oh no, I think I teased him to much" Riveria grabbed Bell and brought him inside, Finn was their and immediately knew who she was carrying
"Oh Riveris this must be Bell?" Finn asked "the one that you keep on talking about"
"Yes Finn, although I didn't expect him to be coming today, can you please tell Loki that I need to talk to her?" Riveria asked, Finn nodded and made his way to Loki's room.
Riveria Carried Bell to a spare room and went to Loki's room to talk to her about letting Bell join. When she walked in he saw Loki actually actually 'normal' which was weird
"Riveria why didn't you tell us..." Loki said as she looks right at Riveria, meanwhile Finn was just standing there with a 'what did I just get myself into' look on his face.
"Tell you what?" Riveria asked, she felts really scared from some off reason.
"Well why didn't you tell us you were engaged!" Loki said while pumping up her hands in excitement, "I'm gonna tel everyone!"
"Wait-" Riveria said before being cut off by Loki's yelling
"Everyone! Riveria is engaged! You guys have a dad!" Loki said while running around the manor like a madman.
"Finn, how did she find out about Bell?" Riveria asked
"When I walked in she said she saw you kissing someone and she said she heard you talking to him about being your fiancé" Finn replied, he didn't want to feel Riveria's wrath.
Time Skip
There were people sitting around the table, it was a meeting between the entire familia.
"Riveria! Why didn't you tell us you were married?" Two Amazon's asked while getting close to Riveria
"W...Well Tione and Tiona no one asked do it never came up" Riveria said as she thought for an excuse
"Lies! We asked you last time!" An orange haired elf asked
"Come on now Lefiya, let's not jump to any conclusions" Riveria said while backing up
"What does he-" Lefiya asked before being cut off by a scream.
"Ahhhhh" a voice called out
"Wait, no one else is in the rooms...besides Bell!" Riveria said while running up the stairs as everyone else followed behind
When they entered the room they saw a girl with long white hair and ruby red eyes
"Riveria what happened to me!?" The girl said
"W...Wait B..Bell!?" Riveria said, "how did you become a girl!?"
"W..Woah" Bete said as he fell down from a nose bleed
Loki was about to run at Bell until Bell stood up and punched Loki in the gut.
Meanwhile the entire girls section of the familia were cheering while the boys were watching their new white haired beauty.
AN: If my boy bell is gonna turn to a girl he's gotta be a girl that's gonna get all the attention. So in the dream/flashback that was when Bell and Riveria met, by that time Riveria was 10 and Bell was 5. When bell was sent to the mission he was 12 and Riveria was 17 so currently Bell is 19 while Riveria is 24
This idea is from ArigoPh Btw I hope it fits your description I was kinda writing as I went to make it flow a little better.